Im going to have to redirect you to head-fi (google them, cant post URLs ><)
These guys know their stuff.
I just bought an Ultrasone HFI-780 off of someone on ebay for %150 used and they retail for almost 300 i believe.
A good majority of the people said the HFI780s are some of the best for EDM, so i picked them up :P
Now just waiting to be shipped ^.^|/